Someone who doesn't shut up for even 1 hour when already been told to shut the fuck up over 10 times. Can be a loser who has no friends but is very social, he would even bother the heck out of people who aren't even his friends until he gets beat up. These people are often to most hated ones.

Annoying person: (talking constantly.......)
1st person: Shut up, no one likes you
Annoying person: (still talking......)
1st person: Can you shut upp! you don't have friends
Annoying person: (still talkks no matter what......)
1st person: DUDE SDFU!!! your sooo annoying
Annoying person: (talks coninuously for another hour....)
1st person: If you don't shut up, you won't like the results!!
Annoying person: (talks to people for another hour....)
2nd person: OMG CAN YOU SDFU!! People are about to beat you up
Annoying person: (Doesn't care, just laughs and continues to talk....)
1st person: I'm beat the shit out of you!! its not funny
2nd person: i'm helping too!!